Overview
- Researchers confirmed late Wednesday that a roughly 3.9–4 tonne Falcon 9 upper stage struck the Moon near the Einstein crater at about 08:35 MESZ, ending a cislunar trajectory that began after a January 15, 2025 launch.
- Teams estimate the stage hit at about 2.4 km/s, releasing roughly 11.4 gigajoules of kinetic energy—an impact energy comparable to about 2.8 tonnes of TNT—and models predict a new crater on the order of tens of metres in diameter.
- The European Southern Observatory’s VLT recorded spectroscopic signals and a debris cloud with emissions including lithium and sodium that persisted minutes after the collision, which scientists say confirm the event even though the moment of impact was not optically seen from most ground stations.
- Orbiting assets are providing follow‑up: South Korea’s Danuri (KARI) has returned images showing a fresh dark spot at the impact site and NASA’s Lunar Reconnaissance Orbiter is due to make high‑resolution passes in the coming days to measure the crater precisely.
- Beyond the immediate science opportunity to study ejecta dynamics and surface contamination, the incident highlights gaps in binding rules for disposal of spent stages in cislunar space and could prompt tighter operational and policy measures as lunar activity increases.